Sampling device for environmental monitoring and use method thereof

Abstract

The invention belongs to the technical field of measurement, and particularly relates to a suction device for liquid sampling, in particular to a sampling device for environmental monitoring and a use method thereof.The sampling device for environmental monitoring comprises a base, a sampling hose, a movable extrusion assembly and a driving mechanism, and the sampling hose is driven by changing an original fixed extrusion mode; the movable extrusion assembly is adopted, the sampling hose is used for guiding the movable extrusion assembly while the sampling hose is extruded, so that the movable extrusion assembly moves in the axis direction during rotation, pressure borne by the two sides of the sampling hose is balanced, and deformation occurs on the two sides of the sampling hose as uniformly as possible; therefore, the service life of the sampling hose is prolonged, the replacement frequency of the sampling hose is reduced, and the maintenance cost during environment monitoring is reduced.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and specifically relates to a suction device for liquid sampling, and more particularly to a sampling device for environmental monitoring and a use method thereof. Background Art

[0002] Environmental monitoring refers to the monitoring of various pollutants in the environment and their changing trends through regular or irregular observation, measurement and analysis activities.

[0003] In the related technology, environmental monitoring of water quality requires regular sampling of liquids to complete the test. At present, peristaltic pumps are generally used to sample liquids and then store them for subsequent water quality testing. When the peristaltic pump is running, the hose often deforms, especially for spirally installed hoses, where deformation is more common.

[0004] Therefore, how to avoid hose deformation to extend the service life of the hose is a technical problem that needs to be solved urgently.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0006] The embodiments of the present disclosure at least provide a sampling device for environmental monitoring and a method for using the same.

[0007] In a first aspect, an embodiment of the present disclosure provides a sampling device for environmental monitoring, comprising: A base having a receiving cavity; A sampling hose, which is arranged in the accommodating cavity; The sampling end of the sampling hose passes through the side wall of the base, enters the accommodating cavity, and then goes around the inner wall of the accommodating cavity and passes through the side wall of the base; and the sampling end and the sampling end of the sampling hose are staggered and located on the same horizontal plane; A movable squeezing assembly is rotatably disposed in the accommodating cavity and is used to squeeze the sampling hose when rotating so as to transport the liquid to be sampled in the sampling hose; A driving mechanism, which is used to drive the mobile extrusion assembly to rotate; During operation, the driving mechanism drives the mobile extrusion assembly to rotate, and guides the mobile extrusion assembly through the sampling hose, so that the mobile extrusion assembly squeezes the sampling hose during rotation and moves along the axial direction during rotation.

[0008] In an optional embodiment, the mobile extrusion assembly includes: A rotating spindle, which is rotatably disposed within the base; A rotating frame connected to the rotating main shaft, and the rotating frame is provided with an auxiliary shaft parallel to the rotating main shaft; A roller, which is sleeved on the auxiliary shaft and elastically connected to the rotating frame via a return spring; Wherein, a guide groove is provided on the side wall of the roller, and the side wall of the sampling hose abuts against the guide groove; During operation, the driving mechanism drives the rotating main shaft to rotate, thereby driving the rotating frame to rotate; when the rotating frame rotates, it drives the roller to rotate and squeeze the sampling hose. At the same time, the roller moves along the axial direction of the rotating main shaft under the guidance of the guide groove and the sampling hose, and is reset by the reset spring after the roller is separated from the side wall of the sampling hose.

[0009] In an optional embodiment, the distance between the side wall of the intersection of the sampling end and the sampling end of the sampling hose and the axis of the rotating main shaft is L1; The distance between the axis of the auxiliary shaft and the axis of the rotating main shaft is L2; The radius of the roller is R; Among them, L1>L2+R, so as to reserve a reset space for the reset spring to rebound and reset.

[0010] In an optional embodiment, the roller includes: a first ferrule, a second ferrule and an adjusting member; The first ferrule and the second ferrule are sleeved on the auxiliary shaft; The guide groove is formed by the opposite side surfaces of the first ferrule and the second ferrule; The adjusting member is used to adjust the distance between the first clamping sleeve and the second clamping sleeve, that is, to adjust the width of the guide groove.

[0011] In an optional embodiment, the adjusting member includes: an adjusting motor and a bidirectional screw; The regulating motor is fixedly arranged on the second ferrule; The bidirectional screw passes through the first ferrule and the second ferrule in sequence, and is threadedly connected with the first ferrule and the second ferrule respectively; The adjusting motor is used to drive the bidirectional screw to rotate so as to adjust the distance between the first ferrule and the second ferrule, that is, to adjust the width of the guide groove.

[0012] In an optional embodiment, the environmental monitoring sampling device further includes a control module; The control module is electrically connected to the regulating motor and the driving mechanism respectively; Furthermore, the control module is configured to control the adjustment motor to operate in a normal working state, adjust the width of the guide groove to a first width, and then control the drive mechanism to operate; The control module is further configured to control the adjustment motor to operate in a standby state to adjust the width of the guide groove to a second width; The first width is smaller than the diameter of the sampling hose, and the second width is larger than the diameter of the sampling hose.

[0013] In an optional embodiment, the mobile extrusion assembly further includes a through-beam photoelectric sensor; The transmitting end and the receiving end of the through-beam photoelectric sensor are respectively arranged on the opposite sides of the first ferrule and the second ferrule, and are used to detect whether the sampling hose after the restored deformation blocks the through-beam light path of the transmitting end and the receiving end of the through-beam photoelectric sensor; The control module is electrically connected to the through-beam photoelectric sensor; The control module is further configured to control the through-beam photoelectric sensor to work in a standby state, and when detecting that the through-beam photoelectric sensor is turned on, control the adjustment motor to work to adjust the width of the guide groove to a third width, and then control the drive mechanism to work for a preset time, control the adjustment motor to work to adjust the width of the guide groove to the second width, control the through-beam photoelectric sensor to work again, and issue a sampling hose replacement instruction if the through-beam photoelectric sensor is detected to be turned on again; The third width is equal to the diameter of the sampling hose.

[0014] In a second aspect, the present disclosure also provides a method for using a sampling device for environmental monitoring, the method comprising: Place the sampling end of the sampling hose into the liquid to be sampled; Controlling the adjustment motor to work, and adjusting the guide groove width of the roller of the mobile extrusion assembly to a first width; The driving mechanism is controlled to work so as to drive the mobile extrusion assembly to rotate, and the mobile extrusion assembly squeezes the sampling hose during rotation and moves along the axis direction during rotation to enter a normal working state; After the sampling is completed, the driving mechanism is controlled to stop working, and then the regulating motor is controlled to work, so as to adjust the guide groove width of the roller of the mobile extrusion assembly to the second width and enter the standby state; The first width is smaller than the diameter of the sampling hose, that is, the first width is used to squeeze the sampling hose to complete the delivery of the liquid to be sampled; The second width is greater than the diameter of the sampling hose, that is, the second width is used to relieve the squeezing of the sampling hose and reduce the deformation damage of the sampling hose.

[0015] In an optional embodiment, in the standby state, the method for using the environmental monitoring sampling device further includes: Control the operation of the through-beam photoelectric sensor; When it is detected that the through-beam photoelectric sensor is turned on, the regulating motor is controlled to work and the width of the guide groove is adjusted to the third width; After the control driving mechanism works for the first preset time, the adjustment motor is controlled to work, the width of the guide groove is adjusted to the second width, and the through-beam photoelectric sensor is controlled to work again. If the through-beam photoelectric sensor is detected to be turned on again, an instruction to replace the sampling hose is issued.

[0016] In an optional embodiment, in the standby state, the method for using the environmental monitoring sampling device further includes: Regularly control the cleaning of the side wall of the sampling hose, namely: Controlling the adjusting motor to work, adjusting the width of the guide groove to a fourth width; The driving mechanism is controlled to work for a second preset time to complete regular cleaning of the sampling hose.

[0017] The beneficial effect of the present invention is that the sampling device for environmental monitoring and the method of using the same change the original fixed extrusion method and adopt a mobile extrusion assembly. While extruding the sampling hose, the mobile extrusion assembly is guided by the sampling hose so that the mobile extrusion assembly moves along the axial direction during rotation, thereby balancing the pressure on both sides of the sampling hose and making the deformation as evenly as possible on both sides of the sampling hose, thereby extending the service life of the sampling hose, reducing the replacement frequency of the sampling hose, and further reducing the maintenance cost during environmental monitoring.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a sampling device for environmental monitoring provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of a portion of the structure of a sampling device for environmental monitoring provided in an embodiment of the present disclosure; Figure 3 A front view of a partial structure of a sampling device for environmental monitoring provided by an embodiment of the present disclosure; Figure 4 A schematic diagram of the structure of a mobile extrusion assembly provided in an embodiment of the present disclosure; Figure 5 A cross-sectional view of a partial structure of a sampling device for environmental monitoring provided by an embodiment of the present disclosure; Figure 6 A cross-sectional view of a portion of the structure of a mobile extrusion assembly provided by an embodiment of the present disclosure; Figure 7 A control principle diagram of a sampling device for environmental monitoring provided by an embodiment of the present disclosure; Figure 8 A flow chart of a method for using the sampling device for environmental monitoring provided in an embodiment of the present disclosure.

[0022] In the figure: 100, base; 110, accommodating chamber; 200, sampling hose; 210, injection end; 220, sample outlet end; 300, movable extrusion assembly; 310, rotating main shaft; 320, rotating frame; 330, auxiliary shaft; 340, roller; 341, first ferrule; 342, second ferrule; 3421, splicing tooth; 343, adjusting member; 3431, adjusting motor; 3432, bidirectional screw; 344, guide groove; 345, through-beam photoelectric sensor; 3451, transmitting end; 3452, receiving end; 346, reset spring; 400, driving mechanism. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, in the drawings, the thickness of the components may be exaggerated or reduced in order to effectively describe the technical content.

[0025] In response to the technical problems mentioned in the background technology, the inventors have discovered that when the peristaltic pump is running, the roller will continuously squeeze the hose, causing the hose to deform. Especially for the spirally installed hose, the friction of the roller on one of the side walls of the hose will increase, resulting in different squeezing forces on the hose as a whole, aggravating the decrease in the elasticity of the hose, resulting in a reduction in the service life of the hose, and the need for frequent replacement of the hose.

[0026] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article for the above problems should be the contributions made by the inventor to the present invention during the disclosure process.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] See also Figure 1 and Figure 2 At least one embodiment discloses a sampling device for environmental monitoring, comprising the following structure: The base 100 is provided with a receiving cavity 110. The shape and size of the base 100 are not limited, and the side wall shape of the receiving cavity 110 is similar to the side wall of a cylinder, so as to facilitate the subsequent installation of the sampling hose 200.

[0030] The sampling hose 200 is disposed in the accommodating chamber 110. The sampling hose 200 is selected according to the required pressure bearing capacity and durability.

[0031] The inlet end 210 of the sampling hose 200 passes through the side wall of the base 100, enters the accommodating cavity 110, circles along the inner wall of the accommodating cavity 110, and then passes through the side wall of the base 100; and the inlet end 210 and the outlet end 220 of the sampling hose 200 are staggered and located on the same horizontal plane.

[0032] In certain specific occasions, in order to reduce the bending angle of the sampling hose 200, the sampling hose 200 is placed in the accommodating cavity 110 of the base 100 after being wrapped around once, and both ends of the sampling hose 200, namely the sample inlet end 210 and the sample outlet end 220, pass through the side wall of the base 100.

[0033] The mobile squeezing assembly 300 is rotatably disposed in the accommodating chamber 110 and is used to squeeze the sampling hose 200 during rotation to transport the liquid to be sampled in the sampling hose 200. By changing the original fixed squeezing method and using the mobile squeezing assembly 300, the sampling hose 200 is squeezed and the mobile squeezing assembly 300 is guided by the sampling hose 200.

[0034] The driving mechanism 400 is used to drive the mobile extrusion assembly 300 to rotate. The specific structure of the driving mechanism 400 is not limited, and any structure that can drive the mobile extrusion assembly 300 to rotate is within the protection scope of this embodiment, for example, a motor is used for driving.

[0035] When working, the driving mechanism 400 drives the mobile extrusion assembly 300 to rotate (the rotation direction is as follows: Figure 2 As shown in F in the figure, the mobile extrusion assembly 300 is guided by the sampling hose so that the mobile extrusion assembly 300 squeezes the sampling hose 200 when rotating and moves along the axial direction of the rotation.

[0036] By changing the original fixed extrusion method and adopting a mobile extrusion assembly 300, while extruding the sampling hose 200, the mobile extrusion assembly 300 is guided by the sampling hose 200, so that the mobile extrusion assembly 300 moves along the axial direction during rotation, thereby balancing the pressure on both sides of the sampling hose 200, making the deformation as even as possible on both sides of the sampling hose 200, thereby extending the service life of the sampling hose 200, reducing the replacement frequency of the sampling hose 200, and further reducing the maintenance cost during environmental monitoring.

[0037] See also Figure 2 and Figure 5 , the mobile extrusion assembly 300 includes the following structure: The rotating main shaft 310 is rotatably arranged in the base 100. The rotating main shaft 310 drives the mobile extrusion assembly 300 to rotate as a whole, and is transmission-connected with the driving mechanism 400, that is, when the driving mechanism 400 is working, it drives the rotating main shaft 310 to rotate.

[0038] The rotating frame 320 is connected to the rotating main shaft 310, and the rotating frame 320 is provided with an auxiliary shaft 330 parallel to the rotating main shaft 310. The rotating frame 320 is sleeved on the rotating main shaft 310 and then fixedly connected to the rotating main shaft 310. When the rotating main shaft 310 rotates, the rotating frame 320 can be driven to rotate at the same time, thereby driving the auxiliary shaft 330 on the rotating frame 320 to rotate.

[0039] The number of auxiliary shafts 330 is set according to usage. Figure 2 In the embodiment, the number of the auxiliary axes 330 is two. In other embodiments, the number of the auxiliary axes 330 can be any positive integer.

[0040] The roller 340 is sleeved on the auxiliary shaft 330 and elastically connected to the rotating frame 320 via a return spring 346. The roller 340 is a main extrusion device, which is installed on one of the auxiliary shafts 330. When rotating with the auxiliary shaft 330, the roller 340 can squeeze the sampling hose 200 to complete the delivery of the liquid in the sampling hose 200.

[0041] The main function of the return spring 346 is to pull the roller 340 from the tube wall of the sample outlet end 220 to the tube wall of the sample inlet end 210 to complete the cycle. Figure 5 As shown in F2.

[0042] The side wall of the roller 340 is provided with a guide groove 344, and the side wall of the sampling hose 200 abuts against the guide groove 344. By providing the guide groove 344, the roller 340 can move along the side wall of the spiral sampling hose 200, thereby generating an axial displacement, thereby changing the fixed extrusion method in the related art to a movable extrusion method, thereby balancing the pressure on both sides of the sampling hose 200, that is, the axial friction force generated by the contact between the sampling hose 200 and the roller 340 drives the roller 340 to generate an axial displacement (such as Figure 5 As shown in F1 in the figure, the pressure on both sides of the sampling hose 200 is balanced.

[0043] During operation, the driving mechanism 400 drives the rotating main shaft 310 to rotate, thereby driving the rotating frame 320 to rotate; when the rotating frame 320 rotates, it drives the roller 340 to rotate and squeeze the sampling hose. At the same time, the roller 340 moves along the axial direction of the rotating main shaft 310 under the guidance of the guide groove 344 and the sampling hose 200, and after the roller 340 is separated from the side wall of the sampling hose 200, it rebounds and resets through the reset spring 346.

[0044] See also Figure 3The distance between the side wall of the intersection of the sample inlet end 210 and the sample outlet end 220 of the sampling hose 200 and the axis of the rotating main shaft 310 is L1; the distance between the axis of the auxiliary shaft 330 and the axis of the rotating main shaft 310 is L2; ​​the radius of the roller 340 is R; wherein, L1>L2+R, so as to reserve a reset space for the reset spring 346 to rebound and reset.

[0045] The units of L1, L2 and R are all CM.

[0046] By limiting the distance between the roller 340 and the intersection of the sample inlet end 210 and the sample outlet end 220 of the sampling hose 200 , a reset space is reserved for the roller 340 and the sampling hose 200 to be released from the squeeze, so as to facilitate the rebound of the reset spring 346 .

[0047] See also Figure 4 The roller 340 includes a first clamping sleeve 341 , a second clamping sleeve 342 and an adjusting member 343 . The adjusting member 343 is used to adjust the distance between the first clamping sleeve 341 and the second clamping sleeve 342 .

[0048] The first ferrule 341 and the second ferrule 342 are sleeved on the auxiliary shaft 330. Specifically, the first ferrule 341 and the second ferrule 342 are slidably arranged on the auxiliary shaft 330 through a slider. The opposite sides of the first ferrule 341 and the second ferrule 342 are staggeredly provided with splicing teeth 3421, so that the connection between the first ferrule 341 and the second ferrule 342 is more stable.

[0049] The guide groove 344 is formed by the opposite sides of the first clamping sleeve 341 and the second clamping sleeve 342. The span of the guide groove 344 is adjustable to meet the use requirements of the sampling hose 200 in different states.

[0050] The adjusting member 343 is used to adjust the distance between the first clamping sleeve 341 and the second clamping sleeve 342, that is, to adjust the width of the guide groove 344. The adjusting member 343 is controlled by the control module to adjust the distance between the first clamping sleeve 341 and the second clamping sleeve 342.

[0051] See also Figure 6 The adjusting member 343 includes: an adjusting motor 3431 and a bidirectional screw 3432 .

[0052] The adjusting motor 3431 is fixedly disposed on the second clamping sleeve 342. In other embodiments, the adjusting motor 3431 can be fixedly disposed on the first clamping sleeve 341, and the setting position of the adjusting motor 3431 is set according to the use requirements.

[0053] The bidirectional screw 3432 passes through the first ferrule 341 and the second ferrule 342 in sequence, and is respectively threadedly connected with the first ferrule 341 and the second ferrule 342. With the structure of the bidirectional screw 3432, when the bidirectional screw 3432 rotates clockwise, the first ferrule 341 and the second ferrule 342 can move toward each other, and when the bidirectional screw 3432 rotates counterclockwise, the first ferrule 341 and the second ferrule 342 can move away from each other.

[0054] The adjusting motor 3431 is used to drive the bidirectional screw 3432 to rotate so as to adjust the distance between the first clamping sleeve 341 and the second clamping sleeve 342 , that is, to adjust the width of the guide groove 344 .

[0055] In other embodiments, the adjusting member 343 may adopt a structure such as a servo, a stepping motor, etc. As long as the driving method can adjust the distance between the first clamping sleeve 341 and the second clamping sleeve 342, it is within the protection scope of this embodiment.

[0056] See also Figure 7 The environmental monitoring sampling device further comprises a control module, which is electrically connected to the regulating motor 3431 and the driving mechanism 400. After receiving the corresponding control instruction, the control module controls the regulating motor 3431 and the driving mechanism 400 to work.

[0057] Specifically, the control module is configured to control the adjustment motor 3431 to operate in a normal working state, adjust the width of the guide slot 344 to a first width, and then control the drive mechanism 400 to operate.

[0058] Under normal working conditions, the first width is smaller than the diameter of the sampling hose 200 . When the sampling hose 200 is squeezed, the sampling hose 200 is deformed, and part of the side wall of the sampling hose 200 cooperates with the guide groove 344 , thereby guiding the roller 340 .

[0059] The control module is further configured to control the adjustment motor 3431 to work in the standby state to adjust the width of the guide slot 344 to the second width. In the standby state, the width of the guide slot 344 is adjusted to the second span, the sampling hose 200 is loosened, and the squeezing of the sampling hose 200 is released.

[0060] See also Figure 6 as well as Figure 7 The movable extrusion assembly 300 also includes a through-beam photoelectric sensor 345 .

[0061] The transmitting end 3451 and the receiving end 3452 of the opposing photoelectric sensor 345 are respectively arranged on the opposite sides of the first ferrule 341 and the second ferrule 342, and are used to detect whether the sampling hose 200 after restoring the deformation blocks the opposing light path of the transmitting end 3451 and the receiving end 3452 of the opposing photoelectric sensor 345.

[0062] The sampling hose 200 in the standby state is detected by the through-beam photoelectric sensor 345. When the sampling hose 200 has a strong ability to recover its deformation, the sampling hose 200 blocks the light path between the transmitting end 3451 and the receiving end 3452. At this time, the through-beam photoelectric sensor 345 does not work. When the sampling hose 200 has a weak ability to recover its deformation, the sampling hose 200 cannot block the light path between the transmitting end 3451 and the receiving end 3452. At this time, the through-beam photoelectric sensor 345 is turned on and sends a corresponding signal to the control module.

[0063] The control module is electrically connected to the through-beam photoelectric sensor 345 , and controls the through-beam photoelectric sensor 345 to work, and receives a conduction signal sent by the through-beam photoelectric sensor 345 .

[0064] The control module is also configured to control the through-beam photoelectric sensor 345 to work in the standby state, and when detecting that the through-beam photoelectric sensor 345 is turned on, control the adjusting motor 3431 to work, adjust the width of the guide groove 344 to the third width, and then control the driving mechanism 400 to work for a preset time, control the adjusting motor 3431 to work, adjust the width of the guide groove 344 to the second width, control the through-beam photoelectric sensor 345 to work again, and if it is detected that the through-beam photoelectric sensor 345 is turned on again, issue an instruction for replacing the sampling hose 200, wherein the third width is equal to the diameter of the sampling hose 200.

[0065] When the recovery ability of the sampling hose 200 is poor, the guide groove 344 assists the sampling hose 200 to recover its deformation, thereby preventing the sampling hose 200 from being in a fatigue state for a long time and delaying the speed at which the elasticity of the sampling hose 200 disappears.

[0066] See also Figure 8 At least one embodiment further provides a method for using the above-mentioned environmental monitoring sampling device, the method comprising: S110: Put the sampling end 210 of the sampling hose 200 into the liquid to be sampled.

[0067] S120: Control the adjustment motor 3431 to work, and adjust the width of the guide groove 344 of the roller 340 of the movable extrusion assembly 300 to a first width.

[0068] The first width is smaller than the diameter of the sampling hose 200 , that is, the first width is used to squeeze the sampling hose 200 to complete the transportation of the liquid to be sampled.

[0069] S130: Control the driving mechanism 400 to work, so as to drive the mobile extrusion assembly 300 to rotate, and the mobile extrusion assembly 300 squeezes the sampling hose 200 and moves along the axis direction of the rotation during the rotation, and enters a normal working state; S140: After the sampling is completed, the driving mechanism 400 is controlled to stop working, and then the adjusting motor 3431 is controlled to work, so as to adjust the width of the guide groove 344 of the roller 340 of the movable extrusion assembly 300 to the second width and enter the standby state.

[0070] The second width is greater than the diameter of the sampling hose 200 , that is, the second width is used to relieve the squeezing of the sampling hose 200 and reduce deformation damage of the sampling hose 200 .

[0071] By changing the original fixed extrusion method and adopting a mobile extrusion assembly 300, while extruding the sampling hose 200, the mobile extrusion assembly 300 is guided by the sampling hose 200, so that the mobile extrusion assembly 300 moves along the axial direction during rotation, thereby balancing the pressure on both sides of the sampling hose 200, making the deformation as even as possible on both sides of the sampling hose 200, thereby extending the service life of the sampling hose 200, reducing the replacement frequency of the sampling hose 200, and further reducing the maintenance cost during environmental monitoring.

[0072] In the standby state, the method for using the environmental monitoring sampling device further includes: S151: Control the through-beam photoelectric sensor 345 to operate.

[0073] S152: When it is detected that the through-beam photoelectric sensor 345 is turned on, the adjusting motor 3431 is controlled to operate to adjust the width of the guide groove 344 to the third width.

[0074] S153: After the driving mechanism 400 is controlled to work for the first preset time, the adjusting motor 3431 is controlled to work, the width of the guide groove 344 is adjusted to the second width, and the opposing photoelectric sensor 345 is controlled to work again. If the opposing photoelectric sensor 345 is detected to be turned on again, an instruction to replace the sampling hose 200 is issued.

[0075] Through steps S151-S153, when the recovery ability of the sampling hose 200 is poor, the guide groove 344 assists the sampling hose 200 to recover its deformation, thereby preventing the sampling hose 200 from being in a fatigue state for a long time and delaying the loss speed of the elasticity of the sampling hose 200. At the same time, it can be found immediately that the deformation ability of the sampling hose 200 has disappeared, which is convenient for reminding maintenance personnel to replace it.

[0076] In the standby state, the method for using the environmental monitoring sampling device further includes: S160: Regularly control the cleaning of the side wall of the sampling hose 200, that is: S161: Control the adjusting motor 3431 to operate and adjust the width of the guide groove 344 to a fourth width.

[0077] S162: Control the driving mechanism 400 to work for a second preset time to complete regular cleaning of the sampling hose 200.

[0078] Through step S160 , the dust on the sampling hose 200 is cleaned regularly, thereby delaying the aging of the sampling hose 200 and increasing the service life of the sampling hose 200 .

[0079] In summary, the present invention provides a sampling device for environmental monitoring and a method of using the same. The sampling device for environmental monitoring includes a base 100, a sampling hose 200, a mobile extrusion assembly 300 and a driving mechanism 400. By changing the original fixed extrusion method, a mobile extrusion assembly 300 is adopted. While extruding the sampling hose 200, the mobile extrusion assembly 300 is guided by the sampling hose 200 so that the mobile extrusion assembly 300 moves along the axial direction during rotation, thereby balancing the pressure on both sides of the sampling hose 200 and making the deformation as evenly as possible on both sides of the sampling hose 200, thereby extending the service life of the sampling hose 200, reducing the replacement frequency of the sampling hose 200, and further reducing the maintenance cost during environmental monitoring.

[0080] In the above discussion, unless otherwise stated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0081] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sampling device for environmental monitoring, characterized in that: include: A base (100) having a receiving cavity (110); A sampling hose (200), which is arranged in the accommodating cavity (110); The sampling hose (200) has a sampling end (210) that passes through the side wall of the base (100), enters the accommodating cavity (110), circles along the inner wall of the accommodating cavity (110), and then passes through the side wall of the base (100); and the sampling end (210) and the sampling end (220) of the sampling hose (200) are arranged alternately and are located on the same horizontal plane; a movable squeezing assembly (300) which is rotatably disposed in the accommodating chamber (110) and is used to squeeze the sampling hose (200) when rotating, so as to transport the liquid to be sampled in the sampling hose (200); A driving mechanism (400) used for driving the movable extrusion assembly (300) to rotate; When in operation, the driving mechanism (400) drives the mobile extrusion assembly (300) to rotate, and guides the mobile extrusion assembly (300) through the inner wall of the sampling hose (200), so that the mobile extrusion assembly (300) squeezes the sampling hose (200) when rotating and moves along the axis direction when rotating.

2. The environmental monitoring sampling device according to claim 1, characterized in that: The mobile extrusion assembly (300) comprises: A rotating main shaft (310) which is rotatably arranged in the base (100); A rotating frame (320) connected to the rotating main shaft (310), and an auxiliary shaft (330) parallel to the rotating main shaft (310) is provided on the rotating frame (320); A roller (340) which is sleeved on the auxiliary shaft (330) and elastically connected to the rotating frame (320) via a return spring (346); Wherein, a guide groove (344) is provided on the side wall of the roller (340), and the side wall of the sampling hose (200) abuts against the guide groove (344); During operation, the driving mechanism (400) drives the rotating main shaft (310) to rotate, thereby driving the rotating frame (320) to rotate; when the rotating frame (320) rotates, it drives the roller (340) to rotate and squeeze the sampling hose; at the same time, under the guidance of the guide groove (344) and the sampling hose (200), the roller (340) moves along the axial direction of the rotating main shaft (310), and after the roller (340) is separated from the side wall of the sampling hose (200), it rebounds and is reset by the reset spring (346).

3. The environmental monitoring sampling device according to claim 2, characterized in that: The distance between the side wall of the intersection of the sample inlet end (210) and the sample outlet end (220) of the sampling hose (200) and the axis of the rotating main shaft (310) is L1; The distance between the axis of the auxiliary shaft (330) and the axis of the rotating main shaft (310) is L2; The radius of the roller (340) is R; Wherein, L1>L2+R, so as to reserve a reset space for the reset spring (346) to rebound and reset.

4. The environmental monitoring sampling device according to claim 2, characterized in that: The roller (340) comprises: a first clamping sleeve (341), a second clamping sleeve (342) and an adjusting member (343); The first clamping sleeve (341) and the second clamping sleeve (342) are sleeved on the auxiliary shaft (330); The guide groove (344) is formed by the first clamping sleeve (341) and the opposite side surfaces of the second clamping sleeve (342); The adjusting member (343) is used to adjust the distance between the first clamping sleeve (341) and the second clamping sleeve (342), that is, to adjust the width of the guide groove (344).

5. The environmental monitoring sampling device according to claim 4, characterized in that: The adjusting member (343) comprises: an adjusting motor (3431) and a bidirectional screw (3432); The regulating motor (3431) is fixedly arranged on the second clamping sleeve (342); The bidirectional screw (3432) passes through the first ferrule (341) and the second ferrule (342) in sequence, and is threadedly connected to the first ferrule (341) and the second ferrule (342) respectively; The adjusting motor (3431) is used to drive the bidirectional screw (3432) to rotate so as to adjust the distance between the first clamping sleeve (341) and the second clamping sleeve (342), that is, to adjust the width of the guide groove (344).

6. The environmental monitoring sampling device according to claim 5, characterized in that: The environmental monitoring sampling device also includes a control module; The control module is electrically connected to the regulating motor (3431) and the driving mechanism (400) respectively; Furthermore, the control module is configured to control the adjustment motor (3431) to operate in a normal working state, adjust the width of the guide groove (344) to a first width, and then control the drive mechanism (400) to operate; The control module is further configured to control the adjustment motor (3431) to operate in a standby state, so as to adjust the width of the guide groove (344) to a second width; The first width is smaller than the diameter of the sampling hose (200), and the second width is larger than the diameter of the sampling hose (200).

7. The environmental monitoring sampling device according to claim 6, characterized in that: The mobile extrusion assembly (300) further comprises a counter-beam photoelectric sensor (345); The transmitting end (3451) and the receiving end (3452) of the opposing photoelectric sensor (345) are respectively arranged on opposite sides of the first ferrule (341) and the second ferrule (342), and are used to detect whether the sampling hose (200) after recovery of deformation blocks the opposing light paths of the transmitting end (3451) and the receiving end (3452) of the opposing photoelectric sensor; The control module is electrically connected to the opposing-beam photoelectric sensor (345); The control module is further configured to control the opposing photoelectric sensor (345) to operate in a standby state, and when detecting that the opposing photoelectric sensor (345) is turned on, control the adjustment motor (3431) to operate to adjust the width of the guide groove (344) to a third width, and then control the drive mechanism (400) to operate for a preset time, and then control the adjustment motor (3431) to operate to adjust the width of the guide groove (344) to the second width, and control the opposing photoelectric sensor (345) to operate again, and if the opposing photoelectric sensor (345) is detected to be turned on again, an instruction to replace the sampling hose (200) is issued; The third width is equal to the diameter of the sampling hose (200).

8. A method for using a sampling device for environmental monitoring, characterized in that: The method comprises: Place the sampling end (210) of the sampling hose (200) into the liquid to be sampled; Controlling the regulating motor (3431) to work, and adjusting the width of the guide groove (344) of the roller (340) of the movable extrusion assembly (300) to a first width; The driving mechanism (400) is controlled to work so as to drive the movable extrusion assembly (300) to rotate, and the movable extrusion assembly (300) squeezes the sampling hose (200) while rotating and moves along the axis direction during the rotation, thereby entering a normal working state; After the sampling is completed, the driving mechanism (400) is controlled to stop working, and then the adjusting motor (3431) is controlled to work, so as to adjust the width of the guide groove (344) of the roller (340) of the movable extrusion assembly (300) to a second width, and enter a standby state; The first width is smaller than the diameter of the sampling hose (200), that is, the first width is used to squeeze the sampling hose (200) to complete the delivery of the liquid to be sampled; The second width is greater than the diameter of the sampling hose (200), that is, the second width is used to relieve the squeezing of the sampling hose (200) and reduce deformation damage to the sampling hose (200).

9. The method for using the environmental monitoring sampling device according to claim 8, characterized in that: In the standby state, the method for using the environmental monitoring sampling device further includes: Controlling the operation of the through-beam photoelectric sensor (345); When it is detected that the opposing photoelectric sensor (345) is turned on, the regulating motor (3431) is controlled to operate, so as to adjust the width of the guide groove (344) to a third width; After the driving mechanism (400) is controlled to work for a first preset time, the adjusting motor (3431) is controlled to work, the width of the guide groove (344) is adjusted to a second width, and the opposing photoelectric sensor (345) is controlled to work again. If the opposing photoelectric sensor (345) is detected to be turned on again, an instruction to replace the sampling hose (200) is issued.

10. The method for using the environmental monitoring sampling device according to claim 8, characterized in that: In the standby state, the method for using the environmental monitoring sampling device further includes: Regularly control the cleaning of the side wall of the sampling hose (200), namely: Controlling the adjustment motor (3431) to work, and adjusting the width of the guide groove (344) to a fourth width; The driving mechanism (400) is controlled to work for a second preset time to complete regular cleaning of the sampling hose (200).

Images